<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/404-logo.png" alt="" />
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 页面主体区域 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px' ">
        <!-- 点击折叠 -->
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <!-- 侧边栏菜单区域 -->
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409EFF"
          unique-opened
          :collapse="isCollapse"
          :collapse-transition="false"
          router
          :default-active="activePath"
        >
          <!-- 一级菜单 -->
          <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
            <!-- 一级菜单的模板区域 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconsObj[item.id]"></i>
              <!-- 文本 -->
              <span>{{item.authName}}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item 
             :index="'/'+subItem.path" 
             v-for="subItem in item.children" 
             :key="subItem.id"
             @click="saveNavState('/'+subItem.path)"
            >
              <template slot="title">
                <!-- 图标 -->
                <i class="el-icon-menu"></i>
                <!-- 文本 -->
                <span>{{subItem.authName}}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
    
      <!-- 右侧内容主体 -->
      <el-main>
          <!-- 路由占位符 -->
          <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data() {
    return {
        // 左侧菜单数据
        menulist: [],
        iconsObj: {
            '125': 'iconfont icon-user',
            '103': 'iconfont icon-tijikongjian',
            '101': 'iconfont icon-shangpin',
            '102': 'iconfont icon-danju',
            '145': 'iconfont icon-baobiao'
        },
        // 是否折叠
        isCollapse: false,
        // 被激活的链接地址
        activePath: ''
    }
  },
  created(){
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    //点击退出,清除token
    logout() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    //获取所有的菜单,左侧菜单内容
    async getMenuList(){
       const {data: res} = await this.$http.get('menus')
      //  console.log(res)
       if (res.meta.status !== 200) return this.$message.error('获取菜单内容失败')
       this.menulist = res.data
    //    console.log(this.menulist)
    },
    //点击折叠
    toggleCollapse() {
        this.isCollapse =! this.isCollapse
    },
    //保存链接的激活状态
    saveNavState(activePath) {
        window.sessionStorage.setItem('activePath', activePath)
        this.activePath = activePath
    }
  }
}
</script>

<style lang="less" scoped>
.home-container {
  height: 100%;
}
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #ffffff;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    img {
      width: 50px;
      height: 50px;
      margin-right: 15px;
    }
  }
}
.el-aside {
  background-color: #333744;
  .el-menu {
      border-right: none;
  }
}
.elmain {
  background-color: #eaedf1;
}
.iconfont {
  margin-right: 10px;
}
.toggle-button{
    background-color: #4A5064;
    font-size: 10px;
    line-height: 24px;
    color: #ffffff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
}
</style>